On average, how many trades do you take per week? I guess the first criterion is whether your current trading method is successful and meeting trading 20 per week objectives. If so, then no problem!
But I suspect from the fact that you have raised the question here that either it is not proving profitable or not as much as you anticipated?
This is maybe not typical of trading on these TFs?
But, on the other hand, if you are trading a method based on each significant candle then it is a more reasonable number although still at the high end. This is just an example not a recommendation!
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So maybe you could give some more detail of what you are doing and why and then it might be possible to comment more precisely? Without any basic knowledge most of the trader thinks that they have to do more and more trade in a day.
As a result it over traded. To get your question answer first you have to find out are you doing profitable trade in a single trade?
If not, are you using the proper method for trading? If you get these answer you will automatically realize how many trade you can do per day.